The wave propagation and vibration transmission in metamaterial-based elastic rods with periodically attached multi-degree-of-freedom (MDOF) dynamic anti-resonant isolator (DAVI) resonators are investigated. A methodology based on a combination of the transfer matrix (TM) method Bloch theorem is developed, yielding an explicit formulation for complex band structure calculation. bandgap behavior...

Abstract Low-frequency sound attenuation is often pursued using Helmholtz resonators (HRs). The introduction of a compliant wall around the acoustic cavity results in two degrees-of-freedom (2DOF) system capable more broadband absorption. In this study, we report amplitude-dependent dynamic response compliant-walled HR and investigate effectiveness compliance to improve absorption linear nonlin...

In this study, the model-matching problem (MMP) in two degree of freedom (2DOF) control structure is defined and solved in the sense of the H∞ optimality criterion in the framework Linear Matrix Inequality (LMI) by using the results on the standard H∞ OCP.

This contribution deals with controlling of semi-batch reactor used for chromium sludge regeneration process. A comparison of three process control approaches is presented. Usual PID controller without online identification (OI) and adaptive PID controller were adapted to semi-batch rector process in our previous studies. The new one two-degree-offreedom (2DOF) controller is developed for the s...

The aim of this work, to design an appropriate Kalman filter(KF) with optimal gain as well as a two degree of freedom compensator for the DC motor, verify the stability of the proposed algorithm and the noise sensitivity are carried out. The design of the present algorithm is to combine both 2DOFPID controller with the optimal gain obtained by designing a (KF) to obtain better performance. The ...

As in most of the existing industrial process control applications, the desired value of the controlled variable, or set-point, normally remains constant (regulatory control or disturbance rejection operation) but needs to be changed (servo-control or setpoint tracking operation) we are mainly interested in the two-degree-of-freedom (2DoF) implementation of the PID control algorithms. The extra...

The effectiveness of the inferential control scheme based on robust fractional-order proportional integral (FOPI) controller is presented for automatic voltage regulation (AVR) applications. method uses two degree freedom (2DOF) in FOPI scheme, which tuned with whale optimization algorithm (WOA). Actually, any AVR needs to keep reactive power synchronous generator at demand level, stable and fr...

Vibration energy harvesting from backpacks has the potential to generate electrical power while leading no significant user metabolic cost increase. Many researchers have invented different energy-harvesting backpacks, but dynamics between human body and backpack not been studied thoroughly in literature. The goal of this paper is investigate dynamic interaction improve comfort. amplitude phase...

In this paper, a real-time implementation of sliding-mode control (SMC) in hardware-in-loop architecture is presented for robot with two degrees freedom (2DOF). It based on discrete-time recurrent neural identification method, as well the high performance obtained from advantages architecture. The process uses high-order network (RHONN) trained modified extended Kalman filter (EKF) algorithm. T...